Coil springs support the weight of the vehicle and allow the body to move up and down. Shocks control the springs’ oscillations. A coilover combines both functions in one component that also allows adjustments to tune the suspension. Although coilovers look like struts, and can be used to replace them on many applications, they should not be referred to as struts because coilovers can also replace shocks, which are not structural suspension members.

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Factory coil springs, shocks, and struts are okay for cruising, but inadequate for spirited street driving and racing. If you want to lower your car for better appearance and less body roll, and fine tune spring preload and shock damping for better handling, coilovers are the answer. There are different types of coilovers and adjustment features vary. Check out the kits on this page and punch in your year, make, and model to see what we have for your car.

Coilovers are a popular choice for lowering ride height. Lowering your car will reduce the gap between the top of the tires and the fenders for that desirable “flush stance”, and lowering the center of gravity helps reduce body roll and improve cornering, braking and acceleration. Unlike lowering springs that reduce ride height by a predetermined amount, coilovers are adjustable, so you can fine tune the height at each wheel. The way the coilover changes height varies according to design. Some use a threaded collar at the base of the spring, while on others the length of the shock body can be changed at the bottom.

A coilover sleeve is the most economical way to change ride height. The threaded sleeve and coil spring fits over the shock or strut in place of the original spring. A locking collar can be raised or lowered on the threads to change ride height. They’re available with different rate springs and they allow you to use your choice of shocks or struts. Some full body coilovers incorporate this adjustment design, with the threads and collar right on the shock/strut body. The downside to this method of ride height adjustment is that ride height adjustment and spring preload can’t be adjusted independently.

Coilovers with threaded lower mounts are the best way to change ride height. The lower mount rotates up or down on the threads, and is then locked in place with a locknut. Spring preload can be adjusted separately using the same threaded collar and locknut system. Premium coilovers also allow shock damping adjustment, to further fine tune handling. Some provide a single adjustment for both compression and rebound damping, while others have separate adjustments for each. Coilovers with a greater range of adjustment allow settings to be changed for street and track and to suit track conditions.

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Aftermarket Coilovers Reviews

Average rating:  4.5  4.7 - 64 reviews
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5 of 5
Supremo
Look awesome, performance is great couldn't get no better!
RPosted by Robert (Chester, VA) /
2008 Infiniti M35
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